Screen-door



(No Model.)

A...,DRUMlvioIml SCREEN DOOR.

Y No. 498,508. 'Patented May so, 189s.

TH: cams PETERS oo. mamumo.. wAsmNGoN. o. c,

UNITED STATES PATENT OFFICE.

ALEXANDERYDRUMMOND, oF soUTH EvANsToN, ILLINOIS.`

SCREEN-DOOR.

SPECIFICATION `forming part of Letters-Patent No. 498,508, dated May 30, 1893. r i* Application iiled October 22, 1892.. Serial No. 449,637.' (No model.) Y

To all whom it may concern.'

Be it known thatLALEXANDER DRUMMOND, a citizen of the United States, residing at lSouth Evanston, in the county of Cookand State of Illinois, have invented A-a new and useful Improvement in Screen-Doors, of which the fol.- lowing is a specification.

Ordinarily the screening of adoor-way is accomplished `by means of an open-work or wire-screen door hung to swing in the sill of the permanent or solid door to serve, when closed, as a barrier against the ingress of 'insects into the room while' the permanent orsolid door is open for purposes of ventilation. This form of screen-door is objectionable because, as ies and'other insect-s seek a draft and find it on the open-work door, through which there is a circulation of air, they light and accumulate on the outer surface of the screen-work; and whenever the door is opened they ily off, but, being convenient to the room,seem to follow the draft andimmediately proceed to enter. Thus each opening of the screen-door is liable to be accompanied by an infiux of insects, particularly flies and mosquitoes, into the room. To prevent the obj ectonable consequence thus described I provide screensides extending out from opposite sides of the door-way and connect or close them overhead by a solid or screen roofing (preferablythe latter); and in the species ofV screen-work .outer vestibule thus formed, I provide a solid, or substantially, or relatively, solid door. Thus'draft is produced through the open-work sides, which causes insects to light on their outer surfaces, where they are not likely to be disturbed by opening the solid door of the screening, on which door there is not the inducement for them to light; and even if they are caused to ily by opening the door, they are not in position to be drawn through the door-openin g into, or to ent-er, the

room.

The accompanying drawing shows my i m` sides of the door-way I extend, at `right-ahr .i i

gies, the screened frames or screens B, B, con.-

nected overhead by a roof B', preferably also in the form of a screened frameor screen, though it may be solid.l In theentrance be-A tween the sides B is a solid door C, which may be of usual or any suitable construction. The sides B being open, and Vthe draft being through them, flies and other insects will light on their outer surfaces,"and will not be induced to light on the door C, because of its Abeing solid, so that opening it will not, as with the usual construction of screen-doors, induce the in flux ofin'sects against which the room.

is to be guarded.

What I claim as new, and desire to secure .1. In combination with a door-way1 A, screensides B extending outward from the sides of the door-way and provided with an overhead covering, and a door C hinged to one of said sides and adapted to be swung on its hinges to open 'Tand close the passage between the sides, substantially as and for the purpose set forth.

2. In combination with a door-way A, screensides VB extending outward from the sides of the door-way and provided with an overhead screen-covering B', and a solid door C hinged to one of said sides and adapted to be swung on its hinges to open and close the passage between the sides, substantial-ly as and the purpose set forth.

ALEXANDER DRUMMOND.

In presence of M. J. FROST, W. N. WILLIAMS.

for 

